# CVE-2018-16169: File upload in Cybozu Remote Service

> Remote authenticated attackers can upload and execute Java code on Cybozu Remote Service servers, leading to arbitrary code execution.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jan 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-99hc-9v5w-8295

## What is CVE-2018-16169?

CVE-2018-16169 is a high-severity vulnerability in Cybozu, Inc. Cybozu Remote Service, published on 9 Jan 2019. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Cybozu Remote Service 3.0.0 to 3.1.0 allows remote authenticated attackers to upload and execute Java code file on the server via unspecified vectors.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2018-16169?

It affects 1 product.


Products: Cybozu Remote Service Manager.

## How do I fix CVE-2018-16169?

No fix has been published for CVE-2018-16169 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-16169 being exploited?

There is no known exploitation of CVE-2018-16169 in the wild and no public exploit code.

## Other vulnerabilities in Cybozu, Inc. Cybozu Remote Service

- [CVE-2021-20795](https://insights.sbomify.com/CVE-2021-20795/): Cross-site request forgery in Cybozu Remote Service (high 8.8)
- [CVE-2018-16171](https://insights.sbomify.com/CVE-2018-16171/): Path traversal in Cybozu Remote Service (high 8.8)
- [CVE-2018-16170](https://insights.sbomify.com/CVE-2018-16170/): Path traversal in Cybozu Remote Service (high 8.1)
- [CVE-2014-7266](https://insights.sbomify.com/CVE-2014-7266/): Denial of service in n/a (high 7.8)
- [CVE-2014-1983](https://insights.sbomify.com/CVE-2014-1983/): Denial of service in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-16169 and fix it if it is affected.

What it is: CVE-2018-16169 is a high-severity vulnerability in Cybozu, Inc. Cybozu Remote Service, published on 9 Jan 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-16169 in the wild and no public exploit code.

Affected product: Cybozu, Inc. Cybozu Remote Service. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2018-16169/ (Markdown: https://insights.sbomify.com/CVE-2018-16169/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-16169
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-16169
- OSV: https://osv.dev/vulnerability/CVE-2018-16169

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-16169/
Summaries are generated and may contain mistakes; the official description above is the record.